Before the big award ceremony, the IIFA Rock event happened, bringing together the stylish divas of Tinsel Town together. And as usual, Bollywood stepped out in their best sartorial choices. Scroll down as we decode their look.Kriti SanonKriti Sanon picked out designer Gaurav Gupta's mermaid gown from his latest collection for the evening. And Oh Boy, she literally did justice to the attire with rose earrings from Outhouse styled by Sukriti Grover. Perfectly lined eyes with mascara, bright-hued lips and pin-straight hair rounded her look.Shraddha KapoorShraddha looked party-ready in a navy blue flouncy gown from Reem Acra that seems to have been inspired by the night sky. It had embellished stars and moons that made her look romantic and whimsical styled by Tanya Ghavri. Smokey eyes,  nude pink lips, and wavy hair added the finishing touches.Dia MirzaDiza Mirza dazzled in a green bodycon sequined dress from designer Monisha Jaising. She accentuated the look with statement earrings from Hajoomal fine jewellery. Subtle sheen makeup with luscious straight hair rounded her look.